stearns



Patented May 28. 1889.

DRILL PRESS E. O. STEARNS.

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E. G. STEARNS.

DRILL PRESS.

No. 404,367. Patented May 28, 1889.

WITNESSES? v NTO W w (No Model.) 3 Sheets-Sheet 3. E. G. STEARNS.

DRILL PRESS.

No. 404,367. Patented May 28, 1889.

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ATTORNEYS N. PETERS. vhelomlw n lm. Wuh'm uuuuuu .C.

NITED STATES PATENT 7 OFFICE.

EDlVARD O. STEARNS, OF SYRACUSE, NEYV YORK, ASSIGNOR TO EDWARD O.STEARNS dz 00., OF SAME PLACE.

DRILL-PRESS.

SPECIFICATION forming part of Letters Patent No. 404,367, dated May 28,1889.

Application filed June 9, 1888. Serial No. 276,580. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD C. STEARNs, of Syracuse, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Drill-Presses, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription.

This invention relates to an improvement in drill-presses; and itconsists in certain peculiarities of the construction and arrangement ofthe same, substantially as will be hereinafter more fully set forth andclaimed.

In order to enable others skilled in the art to which my inventionpertains to make and use the same, I will now proceed to describe itsconstruct-ion and operation, referring to the accompanying drawings, inwhich- Figure l is a side elevation of my drillpress, partly sectioned.Fig. 2 is a vertical section of the feeding-screw; Fig. 3, a plan Viewof the work-table with the standard or main frame of the press insection, and Fig.

4 is a detail view of the hub of the handwheel. Fig. 5 is an enlargedvertical section of the spindle, its actuating-screw, and its supportingbearing or sleeve.

a represents the main frame of my machine, of any desired or suitableform and size, provided with a sleeve or bearing, a, through whichpasses and is supported the feedingscrew a which is loose upon thespindle b, which is upon its lower end provided with a drill-chuck, asusual, and on its upper end with a balance-wheel, b, which is securedthereon by a set-screw, 11 or other suitable means, and has the underside of its hub formed on one side with an inclined recess, 5 (shown inFigs. 1 and 4,) and in this recess, resting upon the top of thescrew-sleeve, is a small roller, 12 This roller is normally resting inthe large end of the recess; but when the wheel is to be brought intouse a slight turn will wedge the roller into the small end of theinclined recess and lock together the screw-sleeve and balance-wheelsecured on the spindle b, so they may be turned freely for a purposepresently explained.

The feeding-screw sleeve a is mounted loosely on the spindle l),interposed between a shoulder, 3, provided thereon, and thebalance-wheel b secured thereto, and the screw sleeve is provided,preferably, with a handwheel, 71, secured thereto in any suitablemanner, in order that the drill may be easily actuated by a wheel ofsuitable size, as the balance-wheel b is of too large diameter tosuccessfully and expeditiously work the drillpress. It will be observed,however, that when desired such hand-wheel might readily be dis- 6opensed with and the balance-wheel used to perform the same function.

As seen in Figs. 2 and 5 of the drawings, the feeding-screw sleeve isprovided with suitable threads engaging with the supporting-bracket a;but at the lower extremity of said sleeve the threads are cut away,leaving a plain sleeve, a closely fitting the interior of the threadprovided in said bracket. lVhen the screw-sleeve has been forced to itsextreme height by means of the actuating mechanism, it will be seenthat, by reason of the threads being cut away on the extremity a thescrewsleeve cannot be disengaged from its supporting-bracket, thuspreventing the machine from being injured by amateurs or carelessoperators, who by unduly forcing upward the sleeve would cause the sameto be disengaged, requiring some time to replace the same. The

threads on the screw-sleeve a are preferably arranged to run out ordisengage before the usual chuck secured to the spindle contacts withthe sleeve a, thus preventing the same from becoming unduly marred orbattered.

Upon the spindle bis placed a pinion, c, through which the spindleslides, and meshing with this is a gear, 0', journaled on a stud on themain frame, said stud being formed with a circumferential groove, 0 nearits outer end, as in Fig. 2. The operating-handie cl is simply astraight rod with a handhold upon one end. This handle is passed throughthe hub of the gear 0 and lies in the groove 0 of the stud, thereby notonly acting as a handle for operating the machine, but 5 also lookingthe gear in place. The handle is pushed through the hub to give more orless power, and is secured at any point by a setscrew, (1, the point ofwhich lies in a longitudinal groove, (1 in the handle, and serves, also,to prevent said handle from turnin The work-supporting table 2 is aplain bracket-casting formed with a cross-bar, e, which rests upon aseries of projections, 6 upon the face of the main frame. It is alsoformed with a pair of hooked lugs, f, which embrace the edges of themain frame and are beveled, as at f, to allow the supporting-table to belifted at its outer end, as in dotted lines in Fig. .l, and it will benoted that this throws the cross-bar 6' out and around the projections 6so the table may be readily raised and lowered.

In operation the work is placed upon the table and the handle turned bythe operator, thus imparting a rapid motion to the drill. The spindle,as will be noted, is sustained by the screw-sleeve, and the weight ofthis, together with its balance and hand wheels, usually sufficient tofeed the spindle and drill down with proper speed, and when they are tobe turned backward the turning of the hand-wheel at once locks thebalance-wheel, secured to the spindle I), and the feedingscrew together,and the spindle is quickly lifted.

Stress is laid on the extreme simplicity of the extension-handle and itsdouble use as a lock for the driving-gear, so that all the parts arevery quickly taken apart and put together again when necessary.

It will be understood that, when desirable, instead of the balance-wheelI) being secured at the extremity of the spindle b, a suitable collar,Z1, might be used, or instead of the shoulder .9, provided on thespindle I), against which the screw-sleeve abuts, a pin, 8, might beprovided upon the spindle b and projecting therefrom; also, there may beother changes in the detail construction and arrangement of the parts ofmy device without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination, with the main frame of a drill-press provided with aseries of projections on its face, of an adjustable worksupporting tableformed with a cross-bar to rest on said projections, and with a pair ofarms hooked around the edges of the main frame and having their rearends beveled, substantially as and for the purpose set forth.

2. In a drill-press, the combination, with the drill-spindle, of asupporting bracket or frame, a should er, s, provided upon said spindlebetween its opposite extremities, a wheel or collar, I), secured to thespindle on one side of the shoulder s, a loose screw-sleeve, a mountedupon the spindle and interposed between said wheel b' and shoulder s, aroller, Z), interposed between said loose screw-sleeve a and the wheelZ2, locking the screw-sleeve a and wheel I) together, with gearing foractuating the spindle, and a hand-hold con nected to said gearing andadjustable at different distances to the motor shaft or spindle of thegearing, substantially as and for the purpose set forth.

3. In a drill-press, the combination, with the main frame provided witha stud circumferentially grooved near its end, of a main driving-gearmounted upon said stud, and an adjustable handle passed through the hubof the gear and the groove in the stud, substantiall y as and for thepurpose set forth.

at. In a drill-press, the combination, with the drill -spindle, thescrew-feeding sleeve thereon, and the main frame, of a wheel or collarsecured upon the top of the spindle, having an inclined recess in itshub, and a small roller placed in said recess, substantially as and forthe purpose set forth.

5. In a drill-press, the combination, with a drill-spindle, of ashoulder and loose screwsleeve mounted on the spindle, means forengaging the screw-sleeve with its spindle, the plain extremity aprovided on the screwslceve, and a suitable bracket provided withthreads engaging the screw-slceve, substantially as and for thepurposeset forth.

(3. In a drill-press, the combination of the frame a, spindle I), guidedrectilinear-l y therein, a shoulder, s, 1'irojecting'from said spindlebetween the opposite extremities thereof, a wheel or collar, 1), securedon the upper extremity of the spindle, a loose screw-sleeve mounted on aspindle and interposed between the collar and shoulder, an inclinedrecess in the hub secured on the spindle, and a roller placed in saidrecess andbearingupon the upper face of the loose screw-sleeve a bindingthe opposite face of the screw-sleeve against the shoulder provided onthe spindle 1), substantially as and for the purpose set forth.

In testimony whereof I have hereunto sign ed of lilarch, 1888.

EDlVARl) STEARNS.

\Vitness s.

F] nonmcK II. Gums, W. U. llIcAnrrHun.

